Description, continued
Installation
Compliance Prediction
The AFBR-703ASDZ transceiver package is compliant Compliance prediction is the ability to determine if an
with the SFF 8432 Improved Pluggable Formfactor hous- optical transceiver is operating within its operating and
ing specification for the SFP+. It can be installed in any
INF-8074 or SFF-8431/2 compliant Small Form Pluggable provide real-time access to transceiver internal supply
(SFP) port regardless of host equipment operating status voltage and temperature, allowing a host to identify po-
environmental requirements. AFBR-703ASDZ devices
The AFBR-703ASDZ is hot-pluggable, allowing the mod- tential component compliance issues. Received optical
ule to be installed while the host system is operating and power is also available to assess compliance of a cable
on-line. Upon insertion, the transceiver housing makes
plant and remote transmitter. When operating out of re-
initial contact with the host board SFP cage, mitigating quirements, the link cannot guarantee error free trans-
potential damage due to Electro-Static Discharge (ESD).
mission.
Digital Diagnostic Interface and Serial Identification
Fault Isolation
The two-wire interface protocol and signaling detail The fault isolation feature allows a host to quickly pin-
are based on SFF-8431. Conventional EEPROM mem- point the location of a link failure, minimizing downtime.
ory, bytes 0-255 at memory address 0xA0, is organized For optical links, the ability to identify a fault at a local
in compliance with SFF-8431. New digital diagnostic device, remote device or cable plant is crucial to speed-
information, bytes 0-255 at memory address 0xA2, is ing service of an installation. AFBR-703ASDZ real-time
compliant to SFF-8472. The new diagnostic information
monitors of Tx_Bias, Tx_Power, Vcc, Temperature and
provides the opportunity for Predictive Failure Identifi- Rx_Power can be used to assess local transceiver current
cation, Compliance Prediction, Fault Isolation and Com- operating conditions. In addition, status flags TX_DIS-
ponent Monitoring.
ABLE and Rx Loss of Signal (LOS) are mirrored in memory
and available via the two-wire serial interface.
Predictive Failure Identification
Component Monitoring
The AFBR-703ASDZ predictive failure feature allows a
host to identify potential link problems before system Component evaluation is a more casual use of the AFBR-
performance is impacted. Prior identification of link 703ASDZ real-time monitors of Tx_Bias, Tx_Power, Vcc,
problems enables a host to service an application via
Temperature and Rx_Power. Potential uses are as debug-
“fail over”to a redundant link or replace a suspect device, ging aids for system installation and design, and trans-
maintaining system uptime in the process. For applica- ceiver parametric evaluation for factory or field qualifi-
tions where ultra-high system uptime is required, a digi- cation. For example, temperature per module can be
tal SFP provides a means to monitor two real-time laser
observed in high density applications to facilitate ther-
metrics associated with observing laser degradation and mal evaluation of blades, PCI cards and systems.
predicting failure: average laser bias current (Tx_Bias)
and average laser optical power (Tx_Power).
2
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